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The best way to understand what a hook does is to look at where it occurs in the source code.
do_action( "hook_name" )apply_filters( "hook_name", "what_to_filter" ).Remember, this hook may occur in more than one file. Moreover, the hook's context may change from version to version.
| Line | Code |
|---|---|
| 138 | /** |
| 139 | * Filters whether to parse the request. |
| 140 | * |
| 141 | * @since 3.5.0 |
| 142 | * |
| 143 | * @param bool $bool Whether or not to parse the request. Default true. |
| 144 | * @param WP $wp Current WordPress environment instance. |
| 145 | * @param array|string $extra_query_vars Extra passed query variables. |
| 146 | */ |
| 147 | if ( ! apply_filters( 'do_parse_request', true, $this, $extra_query_vars ) ) { |
| 148 | return false; |
| 149 | } |
| 150 | |
| 151 | $this->query_vars = array(); |
| 152 | $post_type_query_vars = array(); |
| 153 | |
| 154 | if ( is_array( $extra_query_vars ) ) { |
| 155 | $this->extra_query_vars = & $extra_query_vars; |
| 156 | } elseif ( ! empty( $extra_query_vars ) ) { |